SDR

SDL

G0

G1

INR-

INL-

INR+

INL+

OUTRA

OUTRB

OUTLA

OUTLB

VDD

PVDD

GND

PGND

2.4V to 5.5V

H-BRIDGE

GAIN/

MODULATOR

H-BRIDGE

GAIN/

MODULATOR

OSCILLATOR

CS1

CS2

Ci

Ci

Ci

Ci

AUDIO

INPUT

AUDIO

INPUT

LM4674

SNAS344E – DECEMBER 2005 – REVISED APRIL 2013

www.ti.com

TYPICAL APPLICATION

Ci = 1 μF

CS1 = 1 μF

CS2 = 0.1 μF

Figure 1. Typical Audio Amplifier Application Circuit

EXTERNAL COMPONENTS DESCRIPTION

(Figure 1)

Components

Functional Description

1.

CS

Supply bypass capacitor which provides power supply filtering. Refer to the AUDIO AMPLIFIER INPUT CAPACITOR

SELECTION section for information concerning proper placement and selection of the supply bypass capacitor.

2.

Ci

Input AC coupling capacitor which blocks the DC voltage at the amplifier's input terminals.

2

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